Bending device



July 17, 1934. E. P. TAYLOR 1,967,162

BENDING DEVICE Filed m 26, 1933 I N VEN TORI E. P. 127g! 1" J TM ATTORNEYS.

- UNITED STATES i r 1,967,162 I Y i BEND I NG DEVICE Everett 'P.'Taylor, Athens, Ga. Application May 26, 1933, Serial No. 673,091

' f fo a ms. (01. 153-46) g This inventionrelatesto 'a tube bendingdeviceand more particularly to a tube bending device adapted to beplaced on the top of a table or support and lie in amost'convenient'position to receive the'tube, and the bending operationperformed with the least expenditure of time and energy; i

Another object of the invention is to adapt the device Wofberidingtubes-on different curves and while so'bending the tubes to'holdthem'frorn slipping in the direction of the pressure by the bendinglever; i

Another object of the invention is to provide a rotatable bending wheelfor making the bend ona l'ever soshaped as to secure the mostadvantageousleverage during the bending operation and to locate thewheel on the lever so that its pivot maybe so held that it has notendency to become inclined tothe planeof the wheel.

Another object of the invention is to provide a holding jaw inproximityto the bending lever sotha't-the jaw may be'automaticallyreleased on restoring the lever to its normal position after a bendingoperation.

Another object of the invention is to arrange the parts so that thelever carrying the wheel and the holding jaw are all open to the topside of the device to permit the work to be laid in from the top on oneside of the lever and the holding jaw.

With these and other objects in view which will now be developed as thedescription proceeds, I will describe my invention in connection withthe accompanying drawing in which:-

Figure 1 is a view from above looking down on the bending lever, wheeland clamping jaw, the table or bench support for these parts being leftoff in this view.

Figure 2 is an elevation of the support and the bending device as in usewhile bending a tube and a vise which has legs passing through thebending device to hold it on a supporting bench or table.

1 is an ordinary bench or table having legs 2 and a top 3.

The tube bending device lays flat on the top 3 of the table, as shown inFigure 2, and comprises an upper plate 4 and a lower plate 5. Theseplates are held together near their edges by bolts 6, '7 and are spacedapart sumciently to accommodate the end of a lever 8 having a pivot 9,which may comprise an ordinary bolt, passing through both the upper andlower plates. The end 8 of the lever may have a slot rounded at eitherend and the pivot bolt 9 may slide in PATENT OFFICE-'- theslot 10 andrest in either of thdrounded' end portions in the lever to lengthen orshorten the distance between the pivot bolt 9 and a roller wheel 12. Itis further apparent that by remov ing the pivot bolt 9 the lever end 8may be moved between the plates 4 and 5 to a position where the pivotbolt-9 may be inserted in a second hole 13 in the two plates. Thus theend of the lever 8 may have its pivot located in various positions, onlytwo being shown in Figure 1", to secure bends in a tube of differentdiameters, or to first partially bend a tube on a larger diameter andthen adjust the length of the lever part 8 to bend the tube on a smallerdiameter or radius.

The lever 15 having theend'S is conveniently bent at 16 for purposeshereafter described. The roller 12 is altogether on one side of thelever 15,- there being provided a strip 17 suitably bent" to extend overthe roller and perforated to receive a bolt. By this construction, whenthe tube 20 to be bent is laid from the top downwardly to rest on abracket or support 21 carrying a clamping jaw 22, the tube does not haveto be inserted endways but may be inserted from above and rest on thebracket or support 21 and the top side of the lever 8.

The bracket 21 carries the clamping jaw 22 on an eccentrically mountedpivot 25, whereby when the pivot is turned the jaw 22 may be moved backand forth to vary the angle between the lower edge of the jaw andclamped pipe or tube. I further provide a handle or operating rod 26pivoted at 27 on the support 21 and adapted to have its back portionrest against the upper end of the clamping jaw 22 so that when thehandle is moved in the direction of the arrow A, shown in Figure 1, theback of the handle will strike the end of the clamping jaw 22 anddisconnect it from the tube 20. When the handle is moved in thedirection of the arrow B the lower end 30 will come against the top ofthe clamping jaw 22 and press it into engagement with the tube 20.

In order to automatically release the clamping jaw 22 from the tube orrod 20 after a bending operation, the handle 15 is bent as shown at 16and on its return from the bending operation it is brought in contactwith the outer end of the handle 26 and if the handle has been pushed inthe direction of the arrow B it will automatically move it back in thedirection of the arrow A as the lever 15 is retracted from its bendingoperation. Furthermore, the handle26 will then be brought against theupper end of the clamping jaw 22 and raise it from the tube or rod 20.

To get the best efiect of the lever 15 and to save space it is bent atthe point 16 and during the pulling down of the lever to bend the tubeit is evident that the bend at 16 renders it more convenient to theoperator and furthermore locates the lever 15 so that it willautomatically open the jaw 22 on being returned after the bendingoperation.

In order. to bend atube into a circle for ex ample, Ilessen the diameterof the quadrangu; lar portion 4 at a location and by changing the pivot9 of the lever to shorten the end 8 thereof, I am able to give the tubean extra inward bend at the location 35 and by repeating this operationat various places in the tube I can bend the tube into a circle insteadof, a.

quadrangle.

It is desirable frequently to screw-thread the end of the tube and Ihave provided a rise 40 having an upper portion 41 pivoted to the lowerairt me? wher b thesvise ay b pe d and the tube placed in the holdingopening 43 td holdlit during the screw-thread making opertablesupport,upper and lower plates resting,fi:i. t wiseonthe support and havingbetween them a'bending lever, saidlever having near its innerendaplurality of holes, connected by a slot in the ,lever end, saidlever extending beyond the plates and having abend therein and at itsbend having, a pivot bolt, a roller pivoted on thetop side of saidlever. at said bend, a strip attached Q ena de of i eve d m r c n id toI bolt in the lower end to maintain the bolt at right angles to theplane of the lever and a work clamp having a releasing portion in thepath of movement of said lever whereby a tube to be bent may be laid onsaid lever from above and the roller brought against the tube byoperating the lever about its pivot.

2. A tube bending device comprising upper and lower plates, a leyerpivoted between the plates, saidleyer being bent at a point beyond theplates and having a grooved roller pivoted in said bend, atube clampingand holding device having a handle in the path of the movement of saidlever, said handle being pivoted on the tube holding device andconstructed to release the holding, deyice when contacted by said lever.

'3'. A tube bending and holding device comprising a' lever having agrooved roller pivoted thereto a tube clamping and holding mechanismincluding a handle in the path of the lever, said ub lQXQQ FQ t d l q drs W QQhPPYi R i fi il flr esse i sl j dl e hen. bs e d nsl yer smq e lain a a lhendla I when od.-' .e.qinad riser mpr sing a a l suppqrt, r nnr nd. c e er v ates xt n i ar l el o I J99. a s Support nd Jbsltsdthereto, a bending lever between the plates-and, t nd n beyendt ha em rai W harms, i e2 r-.. n the id t h sr nd a strip. tteshed $9 he ye t oe. 811d. aqembr si he i o o e iant ip jf er entayi a clamping jaw on itsupper side and a handle or rs e ineame mrina aw a iera tu een aid n, hwm igaJ snpqrt an'c i i e, ve er b ubama be. i i's r ed dmabpr o est,thghfil nl a ermlamp n r cri endin lame nss w rat d by h handle to.clarr p th e pip e and. thei lever carrying the ler; rat .1-- 9 bendlgwba sa d handl e n in h reinf. mo em z f e l y f a p rateds g leas utepl mpv' EVERETT- P, Tarpon.

